Abstract Stormwater biofilters rely on healthy plant communities to perform essential functions of stormwater management. Mycorrhizae are a class of fungi which may confer benefits to plants growing in green stormwater infrastructure, just as they do in natural ecosystems. Few studies have investigated the roles of mycorrhizae outside natural ecosystems or agricultural systems. This review describes three mechanisms of mycorrhizal symbiosis which could influence plant function in stormwater biofilters. The first mechanism is mycorrhizae acting as an extension of plant roots, providing water and nutrient for plant growth and resistance to stress. Through this mechanism metal removal could also be improved. The second mechanism, mycorrhizal interaction with the rhizosphere, can contribute to soil organic carbon and impact microbial community structures that ultimately affect the N cycle. A third mechanism is discussed in relation to the impact of mycorrhizae on the photosynthetic activity of plants and its subsequent effect on plant growth and resistance to environmental stress. These three mechanisms will be placed into the context of how mycorrhizae could play a crucial role on plant performance and nutrient and metal removal in stormwater biofilters.

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可改善雨水生物过滤器性能的三种菌根机制

摘要雨水生物过滤器依靠健康的植物群落来执行雨水管理的基本功能。菌根是一类真菌，可以为在绿色雨水基础设施中生长的植物带来益处，就像它们在自然生态系统中一样。很少有研究调查菌根在自然生态系统或农业系统之外的作用。这篇综述描述了菌根共生的三种机制，它们可能影响雨水生物过滤器中的植物功能。第一个机制是菌根作为植物根系的延伸，为植物生长和抗逆性提供水分和养分。通过这种机制，金属去除也可以得到改善。第二种机制，菌根与根际的相互作用，可以促进土壤有机碳并影响最终影响氮循环的微生物群落结构。关于菌根对植物光合活性的影响及其对植物生长和对环境胁迫抗性的后续影响，讨论了第三种机制。这三种机制将被置于菌根如何在雨水生物过滤器中对植物性能以及养分和金属去除发挥关键作用的背景下。